Lubricant filter



W. S. COOK LUBRICANT FILTER April 3, 195.1

2 Sheets-Sheat(y l Filed NOV. l0, 194'?` JNVENToR. af/ff 5. 500% M up //o/wfy.

April 3, 1951 W. s. cooK 2,547,857

LUBRICANT FILTER Filed Nov. 1U, 194'? 2 Sheetvs-Shee 2 IN V EN TOR.

My/'7a 5. (00% J5 a@ 37 ga/MC Patented Apr. 3, 1951 NUNITED STAT-Es PATENT OFFICE `LUBRICANT FILTER WayneS. Cook, Grand Rapids, :'Mich.,Y assigner to Sackner Products, Inc., a,corporation of Michigan ApplicationNovember 1-0, 1947, SerialNo. 785,031

. economically produced.

Second, to provide a lubricant filter which retains its eiiiciency for a relatively long period of time and is not subject to compaction in zones or portions thereof as a result of lubricant'being forced through the filter under pressure.

Third, to provide Va method of manufacturing filters embodying these `advantages which not only enables the economical production of the filter but results in `great uniformity in the product.

Objects relating Hto' details Vand economies of the invention will definitely appear from the description to follow. The invention is ldefined in the claims.

' A structure which embodies the features ofthe invention is clearly `illustrated in the accompanying drawing, in which:

Fig. l is a fragmentary View Vmainly -in vern tical section of a lubricantnlter embodying my invention adapted for "use in an internal combustion engine.

`Fig. 2 is an exploded perspective view of the elements of the-filter cartridge.

Fig, 3 'is a fragmentary perspective View of the preferred form of filtering material, namely, multi-ply cellulose tissue.

Fig. 4 Vis a fragmentary perspective View of one of 'the ltering body cover elements.

Fig. 5 is a perspective viewfillustrating one'of the` steps of my improved method, the sheet of filtering material being conventionally illustrated.

Fig. 6 is a lfragmentary plan View illustrating another step in the method.

Fig. 7 is a perspective View of one of Vthe ltering body sections with the tube therein.

Fig. ,8 is a fragmentary View partially -in verf tical section illustrating the step of inserting the filtering body into the cartridge shell.

Fig. 9 is a perspective view of the filtering .cartridge of the invention with the cover removed.

In the embodiment of the invention illustrated I provide a casing I of suitable dimensions to receive the filtering cartridge designated generally by the numeral 2. The casing I is provided with a side inlet 3 and a discharge or outlet 4 connected to the coupling xture `5 which is nassedlthrough marching ISV vin the bottom O f the casing and provided with a ange T engaging the linner side of the bottom. The cover S8 is provided with a flange 9 retaining the gasket vlil resting upon the outwardly flanged end II of the casing. The screw I2 is threaded into the upper end of the post I3, this post being threaded into the coupling.

The lter unit or cartridge 2 comprises animperforate cylinder shell Iii having :a foraminate bottom I5, the bottom being `provided with a .flange I6 embracingthe lower end of the shell.

The shell is provided with an imperforate cover Il having a flange I8 at its edge embracing -the shell wall. The cover is provided with an opening I9 receiving the post, this opening being surrounded by a gasket 2i] urged to its seat by the :spring 2 I.

Vretaining engagement with the plate 2l'.

To facilitate the distribution or uniform flow of lubricant through the filtering mass I ar-range a screen designated 30 on the inner side of the plate 2l, this screen being formed of quitehea-vy strands of twisted fiber. A fabric disk I3I is arranged on the inner side of the screen 30.

In the manufacture of the cartridge I provide an elongated metal tube 32 on which I convolutely wind the filtering material 23. As stated, this Yis formed of multi-ply creped tissue, a suitable form of which is on the market known as cellulose Wadding. This material is wound under substantial4 tension upon the vtube to a diameter substantially greater than the diameter of the filtering body when it is compressed into the "shell I4 of the lter cartridge.

The tube and the material wound upon the tube are then out into lengths or sections 33, the sections being somewhat longer than the final filtering Vbody when it is assembled in the cartridge. In the accompanying drawing I illustrate a multiple saw 3ft for severing the roll of material into sections and cutting off the projecting end portions ofthe tube which are used as supporting journals during the winding. The `sections 3 3 with the Cartridge tube ,Sections .24 therein are 3 then radially compressed and axially forced into the shell I4 to which the foraminate bottom l5 has been applied. A base or bed member is provided with a seat 36 therein adapted to position the shell relative to the forming die 31.

A feed hopper 38 is provided which has downwardly converging walls adapted at their lower ends to receive the upper end of the cartridge wall or shell I4. A section 33 of the filtering material is placed in this hopper and forced downwardly by means of the plunger 39 having a pilot 40 extending into the tube 24. It should be noted however that before the plunger is engaged with the upper end of the filtering material the filtering body cover parts 21, 30 and 3| are arranged thereon. As the plunger is moved downwardly the filtering body is compressed radially and pushed endwise or axially into the shell and against the bottom l5 thereof. The filtering body is axially compressed somewhat so that the end of the tube passes through the opening 26 in the bottom and is upset or flanged outwardly thereon by means of the upsetting shoulders 4l on the forming die 31. The plunger is provided with upsetting shoulders 42 which engage the upper end of the tube and flange or upset it outwardly into retaining engagement with the foraminate cover plate. The filtering body is upset axially sufi'iciently to permit `the tube to project through -the openings in the foraminate bottom and in the cover plate and to be upset thereon.

The perforations are quite uniformly positioned in the bottom and the cover plate, but to provide a complete distribution of the lubricant filtered I provide the fabric 3| and the screen 30 which provides channels Within the cover plate. The fabric prevents particles from the filtering body from being carried into the screen or cover plate, which might result in clogging some of the perforations and thus to some degree prevent uniform distribution. The chamber 43 between the top of the filter element and the cartridge cover I1 permits flow of the lubricant through the chamber and downwardly through the tube around the post, The post is provided with a longitudinal passage 44 having lateral openings 45 communicating passage 44 with the tube. A gasket 46 is disposed between the bottom of the cartridge and the flange 1 on the coupling 5. The spring 2l urges the cartridge against this gasket and thus prevents the incoming fluid from flowing upwardly in the tube or to the outlet without passing through the filtering mass. The fluid to be filtered flows axially of the filtering material, which presents a large amount of filtering surface.

The filtering body is uniformly compacted so that the tendency for the fluid under pressure to form channels therein is minimized. The foraminate bottom and the foraminate top both tend to produce uniformity of distribution of material in its iiow through the lter.

The filters of this invention may be produced economically and with great uniformity. I have illustrated and described a highly practical embodiment of the invention and the method or steps of producing the same. The filter illustrated is designed for use as a filter for the lubricant of an internal combustion engine, but the filters of this invention are adapted for and have useful advantages in various other types of filters. I have not attempted to illustrate or describe such modifications or adaptations as it is believed this disclosure will enable those skilled in the art to embody or adapt the invention as may be desired.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. In a filter, the combination of a casing provided with a discharge coupling at its bottom, a-

post carried by said coupling and having an outlet passage therein opening to said coupling, a filter cartridge comprising a shell having an imperforate side wall and a foraminate bottom, a top on said shell forming a central hole with an annular seal therearound coacting with said post, an imperforate tube surrounding and spaced from said post and having its lower end disposed through said shell bottom and upset in retaining engagement therewith, the post passage opening within said tube, a filtering body consisting of multi-ply cellulose wadding convolutely wound upon said tube and radially and axially compressed within said shell, a cover for said filtering body comprising a foraminate plate sealingly engaged around its periphery with the inside of said shell, the upper end of said tube being disposed through and upset upon said plate to axially retain the same against the compression of said iilter body, a sheet of fabric on the upper end of said filtering body. a screen of woven fibrous material disposed between said foraminate plate and fabric, there being an outlet chamber between the upper side of said foraminate plate and said top for said shell open to said tube, and a gasket arranged between the bottom of said cartridge and said coupling and coacting therewith to close the lower end of said tube, said casing having an inlet opening positioned exteriorly of said cartridge shell.

2. In a filter, the combination of a casing provided with a discharge coupling at its bottom, a post carried by said coupling and having an outlet passage therein opening to said coupling, a filter cartridge comprising a shell having an imperforate side wall and a foraminate bottom, a top on said shell forming a central hole with an annular seal therearound coacting with said post, an imperforate tube surrounding and spaced from said post and having its lower end disposed through said shell bottom and upset in retaining engagement therewith, the post passage opening within said tube, a ltering body consisting of multi-ply cellulose wadding convolutely wound upon said tube and radially and axially compressed within said shell, a foraminate cover plate sealingly engaged around its periphery with the inside of said shell, the upper end of said tube being disposed through and upset upon said plate to axially retain the same against the compression of said filter body, there being an outlet chamber between the upper side'of said foraminate plate and said top for said shell open to said tube, and a gasket arranged between the bottom of said cartridge and said coupling and coacting therewith to close the lower end of said tube, said casing having an inlet opening positioned exteriorly of said cartridge shell.

3. A lilter cartridge comprising a shell having an imperforate side wall and top and a foraminate bottom, an imperforate tube having its lower end disposed through said shell bottom and upset in retaining engagement therewith, a filtering body consisting of multi-ply creped cellulose convolutely wound upon said tube and radially and axially compressed within said shell, a cover for'said filtering body comprising a foraminate plate sealingly engaged around its periphery with the inside of said shell, the upper end of said tube being disposed through and upset upon said plate to axially retain the same against the compression of said filter body, a sheet of fabric on the upper end of said iiltering body, and a screen of woven fibrous material disposed between said foraminate plate and fabric, there being an outlet chamber between the upper side of said foraminate plate and said top for said shell open to said tube, said top of said shell defining an aperture with a seal around the outside thereof, said aperture being of smaller diameter than said tube and aligned therewith to pass a post extended through said tube.

4. A iilter cartridge comprising a shell having an imperforate side wall and top and a foraminate bottom, an imperorate tube having its lower end disposed through said shell bottom and upset in retaining engagement therewith, a iiltering body consisting of multi-ply creped cellulose convolutely wound upon said tube and radially and axially compressed within said shell, and a foraminate cover plate sealingly engaged around its periphery with the inside of said shell, the upper end of said tube being disposed through and upset upon said plate to axially retain the same against the compression of said filter body, there being an outlet chamber between the upper side of said foraminate plate and said top for said shell open to said tube, said top of said shell defining an aperture with a .seal around the outside thereof, said aperture being of smaller diameter than said tube and aligned therewith to pass a post extended through said tube.

WAYNE S. COOK.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

